7×9

7×9 denotes the product of the integers seven and nine. In standard arithmetic it is the result of adding seven to itself nine times (or nine added to itself seven times). The product is 63. In base-10 notation, sixty-three is written as 63.

Algebraically, 7×9 = 3^2×7, reflecting the prime factorization of the product. It is part of the seven-times and nine-times tables and illustrates the commutative property: 7×9 = 9×7 = 63. It can also be expressed using the distributive property: 7×9 = 7×(10−1) = 70−7 = 63.

Applications and context include its use in area calculations, such as the area of a 7-by-9 rectangle, which equals 63 square units. It serves as a straightforward numeric example in elementary arithmetic to teach multiplication and related properties. In numeral systems other than base 10, the numerical value remains 63, though its digit representation changes; for example, in binary 63 is 111111.